Guy in fleece working for soldier (7)
I believe the answer is:
dragoon
'soldier' is the definition.
(dragoon is a kind of soldier)
'guy in fleece working' is the wordplay.
'guy' becomes 'rag' (both can mean to tease or mock).
'in' means one lot of letters goes inside another.
'fleece' becomes 'do' (I've seen this in other clues).
'working' becomes 'on'.
'rag' put into 'do' is 'drago'.
'drago'+'on'='DRAGOON'
'for' acts as a link.
(Other definitions for dragoon that I've seen before include "Coerce; mounted soldier" , "Browbeat" , "Constrain" , "Cavalryman; coerce (into doing something)" , "Former heavily-armed cavalryman" .)